Harman US

Planting Calendar for ZIP 15425

Based on your local frost dates - last spring frost around Apr 22, first fall frost around Oct 27 - here is when to plant 79 common crops near ZIP 15425.

Last spring frost
Apr 22
First fall frost
Oct 27
Hardiness zone
6b

Vegetables

Crop Start seeds indoors Plant outside Fall planting by
Tomatoes Mar 11 Apr 29 (Transplant out) -
Peppers Feb 25 May 6 (Transplant out) -
Cucumbers Apr 1 Apr 29 (Transplant out) Aug 19
Zucchini Apr 1 Apr 29 (Transplant out) Aug 24
Summer Squash Apr 1 Apr 29 (Transplant out) Aug 22
Winter Squash Apr 1 Apr 29 (Transplant out) -
Pumpkins Apr 1 Apr 29 (Transplant out) -
Green Beans - Apr 22 (Direct sow) Aug 19
Sweet Corn - Apr 29 (Direct sow) -
Melons Apr 1 May 6 (Transplant out) -
Watermelon Apr 1 May 6 (Transplant out) -
Okra - May 6 (Direct sow) -
Eggplant Feb 25 May 6 (Transplant out) -
Lettuce Mar 25 Mar 25 (Transplant out) Aug 24
Spinach - Mar 11 (Direct sow) Aug 29
Kale Mar 11 Apr 1 (Transplant out) Aug 19
Peas - Mar 11 (Direct sow) Aug 14
Carrots - Apr 1 (Direct sow) Aug 4
Beets - Mar 25 (Direct sow) Aug 19
Radishes - Mar 25 (Direct sow) Sep 15
Broccoli Mar 11 Apr 8 (Transplant out) Aug 9
Cauliflower Mar 11 Apr 8 (Transplant out) Aug 4
Cabbage Mar 11 Apr 1 (Transplant out) Aug 4
Onions Feb 11 Mar 25 (Transplant out) -
Potatoes - Apr 8 (Direct sow) -
Swiss Chard Mar 25 Apr 8 (Transplant out) Aug 19
Sweet Potatoes - May 13 (Direct sow) -
Brussels Sprouts Mar 11 Apr 8 (Transplant out) Jul 5
Celery Feb 11 Apr 29 (Transplant out) -
Leeks Feb 11 Apr 8 (Transplant out) Jun 15
Turnips - Apr 8 (Direct sow) Aug 24
Rutabaga - Apr 22 (Direct sow) Jul 10
Parsnips - Apr 8 (Direct sow) Jun 15
Kohlrabi Mar 25 Apr 8 (Transplant out) Aug 19
Collard Greens Mar 11 Apr 8 (Transplant out) Aug 9
Mustard Greens - Apr 8 (Direct sow) Aug 29
Arugula - Apr 8 (Direct sow) Sep 3
Bok Choy Mar 25 Apr 8 (Transplant out) Aug 24
Green Onions - Apr 8 (Direct sow) Aug 14
Tomatillos Mar 11 Apr 29 (Transplant out) -
Fennel Mar 25 Apr 8 (Transplant out) Jul 25
Popcorn Apr 22 May 6 (Transplant out) -
Black-Eyed Peas Apr 22 May 6 (Transplant out) Jul 25
Lima Beans Apr 22 May 6 (Transplant out) -
Edamame Apr 22 May 6 (Transplant out) -
Peanuts Apr 22 May 6 (Transplant out) -
Globe Artichoke Feb 25 Apr 8 (Transplant out) Jul 15
Horseradish Apr 22 Apr 8 (Transplant out) -
Ground Cherries Mar 11 May 6 (Transplant out) -
Radicchio Mar 18 Apr 8 (Transplant out) Aug 4
Endive Mar 18 Apr 8 (Transplant out) Jul 15
Watercress Apr 1 Apr 8 (Transplant out) Aug 14
Sorrel Mar 11 Apr 1 (Transplant out) Aug 14
Sunchokes Apr 22 Apr 8 (Transplant out) -
Malabar Spinach Mar 11 May 6 (Transplant out) -
Amaranth Greens Apr 1 May 6 (Transplant out) Aug 29
Luffa Gourd Mar 11 May 6 (Transplant out) -
New Zealand Spinach Mar 25 May 6 (Transplant out) -
Fava Beans Apr 22 Mar 25 (Transplant out) Jul 20
Chayote Mar 25 May 6 (Transplant out) -
Corn Salad Apr 22 Mar 25 (Transplant out) Aug 14
Bitter Melon Mar 25 May 6 (Transplant out) -
Cardoon Mar 11 Apr 22 (Transplant out) -

Herbs

Crop Start seeds indoors Plant outside Fall planting by
Basil Mar 11 Apr 29 (Transplant out) -
Cilantro - Apr 8 (Direct sow) Aug 24
Parsley Feb 25 May 6 (Transplant out) Jul 30
Dill - Apr 29 (Direct sow) Aug 14
Lemon Balm Mar 11 Apr 22 (Transplant out) -
Borage Apr 22 Apr 22 (Transplant out) Aug 19
Chervil Apr 22 Apr 1 (Transplant out) Aug 19
Lemongrass Feb 25 May 6 (Transplant out) -
Summer Savory Mar 11 Apr 22 (Transplant out) -
Marjoram Mar 11 Apr 29 (Transplant out) -
Lovage Mar 11 Apr 22 (Transplant out) Jul 15
Anise Hyssop Feb 25 Apr 22 (Transplant out) -
Shiso Mar 11 Apr 29 (Transplant out) -
Stevia Feb 25 May 6 (Transplant out) -
Chamomile Mar 11 Apr 8 (Transplant out) Aug 9
Tarragon Apr 22 Apr 22 (Transplant out) -
How to read this calendar

Start seeds indoors is when to sow in trays inside so seedlings are ready to transplant. Plant outside is when to transplant seedlings or direct-sow seed, based on frost tolerance. Fall planting by is the latest date to start a fall crop and still harvest before the first fall frost. Tender crops wait until after the last spring frost; hardy crops can go out earlier.

Computed from NOAA 1991–2020 Climate Normals at Connellsville 2 Ssw, Pa, 3.4 miles away. Averages for planning, not a forecast. Page updated Aug 4, 2026.

Full frost dates for 15425 Local weather →